\begin{table}
\centering
\begin{tblr}[         %% tabularray outer open
]                     %% tabularray outer close
{                     %% tabularray inner open
colspec={Q[]Q[]Q[]},
hline{2}={1-3}{solid, black, 0.05em},
hline{8}={1-3}{solid, black, 0.05em},
hline{1}={1-3}{solid, black, 0.1em},
hline{16}={1-3}{solid, black, 0.1em},
column{2-3}={}{halign=c},
column{1}={}{halign=l},
}                     %% tabularray inner close
& (1) & (2) \\
(Intercept) & \num{324.082} & \num{278.515} \\
& (\num{27.433}) & (\num{55.415}) \\
mpg & \num{-8.830} & \num{-9.985} \\
& (\num{1.310}) & (\num{1.792}) \\
drat &  & \num{19.126} \\
&  & (\num{20.198}) \\
Num.Obs. & \num{32} & \num{32} \\
R2 & \num{0.602} & \num{0.614} \\
R2 Adj. & \num{0.589} & \num{0.588} \\
AIC & \num{336.9} & \num{337.9} \\
BIC & \num{341.3} & \num{343.7} \\
Log.Lik. & \num{-165.428} & \num{-164.940} \\
F & \num{45.460} & \num{23.100} \\
RMSE & \num{42.55} & \num{41.91} \\
\end{tblr}
\end{table}
